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[Qemu-devel] [PATCH v6 09/20] parallels: Switch to .bdrv_co_block_status
From: |
Eric Blake |
Subject: |
[Qemu-devel] [PATCH v6 09/20] parallels: Switch to .bdrv_co_block_status() |
Date: |
Thu, 7 Dec 2017 14:30:25 -0600 |
We are gradually moving away from sector-based interfaces, towards
byte-based. Update the parallels driver accordingly. Note that
the internal function block_status() is still sector-based, because
it is still in use by other sector-based functions; but that's okay
because request_alignment is 512 as a result of those functions.
For now, no optimizations are added based on the mapping hint.
Signed-off-by: Eric Blake <address@hidden>
---
v5: fix pnum when return is 0
v4: rebase to interface tweak, R-b dropped
v3: no change
v2: rebase to mapping parameter; it is ignored, so R-b kept
---
block/parallels.c | 22 +++++++++++++++-------
1 file changed, 15 insertions(+), 7 deletions(-)
diff --git a/block/parallels.c b/block/parallels.c
index 9545761f49..9a3d3748ae 100644
--- a/block/parallels.c
+++ b/block/parallels.c
@@ -280,23 +280,31 @@ static coroutine_fn int
parallels_co_flush_to_os(BlockDriverState *bs)
}
-static int64_t coroutine_fn parallels_co_get_block_status(BlockDriverState *bs,
- int64_t sector_num, int nb_sectors, int *pnum, BlockDriverState **file)
+static int coroutine_fn parallels_co_block_status(BlockDriverState *bs,
+ bool want_zero,
+ int64_t offset,
+ int64_t bytes,
+ int64_t *pnum,
+ int64_t *map,
+ BlockDriverState **file)
{
BDRVParallelsState *s = bs->opaque;
- int64_t offset;
+ int count;
+ assert(QEMU_IS_ALIGNED(offset | bytes, BDRV_SECTOR_SIZE));
qemu_co_mutex_lock(&s->lock);
- offset = block_status(s, sector_num, nb_sectors, pnum);
+ offset = block_status(s, offset >> BDRV_SECTOR_BITS,
+ bytes >> BDRV_SECTOR_BITS, &count);
qemu_co_mutex_unlock(&s->lock);
+ *pnum = count * BDRV_SECTOR_SIZE;
if (offset < 0) {
return 0;
}
+ *map = offset;
*file = bs->file->bs;
- return (offset << BDRV_SECTOR_BITS) |
- BDRV_BLOCK_DATA | BDRV_BLOCK_OFFSET_VALID;
+ return BDRV_BLOCK_DATA | BDRV_BLOCK_OFFSET_VALID;
}
static coroutine_fn int parallels_co_writev(BlockDriverState *bs,
@@ -793,7 +801,7 @@ static BlockDriver bdrv_parallels = {
.bdrv_open = parallels_open,
.bdrv_close = parallels_close,
.bdrv_child_perm = bdrv_format_default_perms,
- .bdrv_co_get_block_status = parallels_co_get_block_status,
+ .bdrv_co_block_status = parallels_co_block_status,
.bdrv_has_zero_init = bdrv_has_zero_init_1,
.bdrv_co_flush_to_os = parallels_co_flush_to_os,
.bdrv_co_readv = parallels_co_readv,
--
2.14.3
- Re: [Qemu-devel] [PATCH v6 04/20] gluster: Switch to .bdrv_co_block_status(), (continued)
- [Qemu-devel] [PATCH v6 05/20] iscsi: Switch cluster_sectors to byte-based, Eric Blake, 2017/12/07
- [Qemu-devel] [PATCH v6 07/20] iscsi: Switch to .bdrv_co_block_status(), Eric Blake, 2017/12/07
- [Qemu-devel] [PATCH v6 06/20] iscsi: Switch iscsi_allocmap_update() to byte-based, Eric Blake, 2017/12/07
- [Qemu-devel] [PATCH v6 08/20] null: Switch to .bdrv_co_block_status(), Eric Blake, 2017/12/07
- [Qemu-devel] [PATCH v6 09/20] parallels: Switch to .bdrv_co_block_status(),
Eric Blake <=
- Re: [Qemu-devel] [PATCH v6 09/20] parallels: Switch to .bdrv_co_block_status(), Vladimir Sementsov-Ogievskiy, 2017/12/09
- Re: [Qemu-devel] [PATCH v6 09/20] parallels: Switch to .bdrv_co_block_status(), Eric Blake, 2017/12/09
- Re: [Qemu-devel] [PATCH v6 09/20] parallels: Switch to .bdrv_co_block_status(), Vladimir Sementsov-Ogievskiy, 2017/12/11
- Re: [Qemu-devel] [PATCH v6 09/20] parallels: Switch to .bdrv_co_block_status(), Vladimir Sementsov-Ogievskiy, 2017/12/11
- Re: [Qemu-devel] [PATCH v6 09/20] parallels: Switch to .bdrv_co_block_status(), Eric Blake, 2017/12/12
- Re: [Qemu-devel] [PATCH v6 09/20] parallels: Switch to .bdrv_co_block_status(), Vladimir Sementsov-Ogievskiy, 2017/12/12
[Qemu-devel] [PATCH v6 10/20] qcow: Switch to .bdrv_co_block_status(), Eric Blake, 2017/12/07
[Qemu-devel] [PATCH v6 11/20] qcow2: Switch to .bdrv_co_block_status(), Eric Blake, 2017/12/07